Hi all, I'm performing a follow-up longitudinal study in a group of patients. I have 2 brain MRIs per patient (T0 and T1 after 4 years). I'd like to know if I can analyse the T0 MRI with FS version 4.0 and compare these results with T1 MRI analyzed with FS version 5.2. Thanks, Irene Mattisi University Hospital of Padova, Italy.